如何将对象从Anchor移动到Anchor？

Question

我的用例是:

1. 点击屏幕并将"点"保存为起始锚点
2. 第二次点击屏幕并将"点"保存为结束锚点
3. 按下将从开始到结束锚点移动对象的按钮

我已经构建了自己的节点,使用ObjectAnimator类似太阳系示例中的类似节点.我唯一的问题是我不知道如何确定评估者的起点和终点.我的第一个想法是从开始和结束锚的姿势中取出x,y,z

Vector3 start = new Vector3(startAnchor.getPose().tx(), startAnchor.getPose().ty(), startAnchor.getPose().tz());
Vector3 end = new Vector3(endAnchor.getPose().tx(), endAnchor.getPose().ty(), endAnchor.getPose().tz());

...

movingAnimation.setObjectValues(startingPoint, endPoint);
movingAnimation.setPropertyName("localPosition");
movingAnimation.setEvaluator(new Vector3Evaluator());

但是当我这样做时,动画是从完全不同的地方完成的.

我没有t found any reference to inbuild tools for such operation. I使用sceneform

所以问题是.如何从锚A到锚B制作流畅的动画(简单的幻灯片就足够了)

Answer 1

我是在HelloSceneform示例中完成的.我创建了第一个AnchorNode并将"andy"节点添加为子节点.在下一次点击时,我创建了endPosition AnchorNode并启动动画以移动到该位置.

要记住的是,如果您使用具有不同父级的对象的位置,则需要使用worldPosition与localPosition.

  private void onPlaneTap(HitResult hitResult, Plane plane, MotionEvent motionEvent) {
      if (andyRenderable == null) {
        return;
      }
      // Create the Anchor.
      Anchor anchor = hitResult.createAnchor();

      // Create the starting position.
      if (startNode == null) {
        startNode = new AnchorNode(anchor);
        startNode.setParent(arFragment.getArSceneView().getScene());

        // Create the transformable andy and add it to the anchor.
        andy = new Node();
        andy.setParent(startNode);
        andy.setRenderable(andyRenderable);
      } else {
        // Create the end position and start the animation.
        endNode = new AnchorNode(anchor);
        endNode.setParent(arFragment.getArSceneView().getScene());
        startWalking();
      }
  }

  private void startWalking() {
    objectAnimation = new ObjectAnimator();
    objectAnimation.setAutoCancel(true);
    objectAnimation.setTarget(andy);

    // All the positions should be world positions
    // The first position is the start, and the second is the end.
    objectAnimation.setObjectValues(andy.getWorldPosition(), endNode.getWorldPosition());

    // Use setWorldPosition to position andy.
    objectAnimation.setPropertyName("worldPosition");

    // The Vector3Evaluator is used to evaluator 2 vector3 and return the next
    // vector3.  The default is to use lerp. 
    objectAnimation.setEvaluator(new Vector3Evaluator());
    // This makes the animation linear (smooth and uniform).
    objectAnimation.setInterpolator(new LinearInterpolator());
    // Duration in ms of the animation.
    objectAnimation.setDuration(500);
    objectAnimation.start();
  }